218086 has 16 divisors (see below), whose sum is σ = 373248. Its totient is φ = 94600.

The previous prime is 218083. The next prime is 218087. The reversal of 218086 is 680812.

218086 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a self number, because there is not a number n which added to its sum of digits gives 218086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (23328).

2²¹⁸⁰⁸⁶ is an apocalyptic number.

218086 is a deficient number, since it is larger than the sum of its proper divisors (155162).

218086 is a wasteful number, since it uses less digits than its factorization.

218086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 218086 is about 466.9967879975. The cubic root of 218086 is about 60.1925296926.

Adding to 218086 its reverse (680812), we get a palindrome (898898).

The spelling of 218086 in words is "two hundred eighteen thousand, eighty-six".